Numb3rs (2005)

S2E24 Hot Shot

Don delves into the homicides of two young women discovered in their vehicles near their residences. Although their deaths appear to be overdoses, Don uncovers evidence pointing to a serial killer at work. Meanwhile, Charlie experiences strange dreams involving his parents. In one vivid dream, his late mother appears and urges him to ask her a question, leaving him puzzled about what that question could possibly be.